Final Update (09/17/18): The iPhone 6 Plus was discontinued on September 12, 2018.
There are variety of pricing plans available for the iPhone 6s Plus. You can pay full price starting at $749, sign a new two-year contract or choose one of the many monthly payment options now favored by carries. Here's a list of prices for the iPhone 6 Plus, which goes up for pre-order on September 12, 2015.
Colors: Silver, Gold, Space Gray, Rose Gold
Storage: 16GB, 64GB, 128GB
Carriers: AT&T, T-Mobile, Verizon Wireless, Sprint